50 
^Bulletin of the JJutural Hisiorv Society. 
Class IV. HOLOTHUROIDEA (Hoi orm riaxs). 
Worm-like, elongated Kchinoderms, with a, leafdienf bod g- wall, and 
contractile tentacles surround ing the mouth. 
Order I. PEI) AT A. 
Numerous ambuJacral feet, sometime-'^ arrauf/ed in the meridians and sometimes 
distributed over the whole surface. 
FAMILY DENDKOCniHOT.F. 
With tre‘ -like branched tentacles, and the amhuJacral feet arranged in regular rows,, 
or confined to one side, which becomes a ivalking disk. 
22. Psoliis phantapus, (Strussrxfeldt), Jaeger. Psolus 
laevigatus, (C). [See Plate, Fig. 15.] 
“ Snail Sea-Cucumber.” 
Descriptiox. (A) p. 303. (C) pp. 35, 36. (N) p. 343. 
Figure. (A) p. 303. 
Distributiox. {a) General; — Low water to eighty-six fath- 
oms. Coast of Maine, Grand Manan and Greenland, and 
around the North Atlantic to Scandinavia and the British 
Isles. 
(5) In N. B. waters; — Grand Manan, forty fathoms, com- 
mon, attached to small stones; Eastport, one specimen, very 
large, from six inches deep in gravel, Stimpson, (D). East- 
port, young, adult rare, Verrill, (N). Gulf of St. Lawrence, 
Orphan and Bradelle Banks, Whit eaves, (P). 
This species resembles in a general way Lophotlmria Fahricii, but 
presents characters by which it may readily be distinguished from it. 
It is of smaller size than the latter species, rarely, in our waters at least, 
attaining a length of three inches, though Forbes (A), says it grows to be 
six or eight inches in length. The flattened under side is quadrangular 
in outline and has three distinct and parallel bands, each of two rows, of 
large and strong tube feet, connected by a few scattering ones at the 
ends. The plates are arranged much as in />. Fahricii, but are much 
smoother, having few granules. Upon the upper side ma3^be seen two 
longitudinal depressions of the skin and plates, representing the position 
of two rows of tube-feet. It is of a brownish color. 
It lives in situations somewhat similar to L. Fahricii, but prefers in 
general deeper water, and is often found in the stomachs of fisheg. But 
little is known of its habits, and nothing of its development. 
